U.S. patent number 9,904,159 [Application Number 14/609,685] was granted by the patent office on 2018-02-27 for illumination system.
This patent grant is currently assigned to DELTA ELECTRONICS, INC.. The grantee listed for this patent is DELTA ELECTRONICS, INC.. Invention is credited to Ching-Liang Chen.
United States Patent |
9,904,159 |
Chen |
February 27, 2018 |
Illumination system
Abstract
An illumination system includes a first light source module and
a first reflective mirror module. The first light source module
includes plural first light sources for emitting plural first light
beams, respectively. The first reflective mirror module includes at
least one first reflective mirror, at least one first fixing
structure, and at least one first adjusting mechanism. The first
reflective mirror is located at a first optical axis of the plural
first light sources. The at least one first fixing structure is
used for fixing the first reflective mirror. The first adjusting
mechanism is connected with the first fixing structure. By moving
or rotating the first adjusting mechanism, a location and an angle
of the first reflective mirror relative to the first optical axis
are correspondingly changed, so that the first light beam is
reflected by the first reflective mirror and guided along a
specified optical path.
Inventors: |
Chen; Ching-Liang (Taoyuan
Hsien, TW) |
Applicant: |
Name |
City |
State |
Country |
Type |
DELTA ELECTRONICS, INC. |
Taoyuan Hsien |
N/A |
TW |
|
|
Assignee: |
DELTA ELECTRONICS, INC.
(Taoyuan Hsien, TW)
|
Family
ID: |
55016924 |
Appl.
No.: |
14/609,685 |
Filed: |
January 30, 2015 |
Prior Publication Data
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Document
Identifier |
Publication Date |
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US 20160004149 A1 |
Jan 7, 2016 |
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Foreign Application Priority Data
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Jul 4, 2014 [TW] |
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103123086 A |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G03B
21/2013 (20130101); G02B 27/108 (20130101); G02B
27/14 (20130101); G02B 7/1822 (20130101); G03B
21/2046 (20130101); G03B 21/2066 (20130101); H04N
9/3164 (20130101) |
Current International
Class: |
F21V
29/10 (20150101); H04N 9/31 (20060101); G02B
7/182 (20060101); G03B 21/20 (20060101); G02B
27/10 (20060101); G02B 27/14 (20060101) |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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102414599 |
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Apr 2012 |
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CN |
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2012133337 |
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Jul 2012 |
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JP |
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2012525681 |
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Oct 2012 |
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JP |
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2012215634 |
|
Nov 2012 |
|
JP |
|
2014154214 |
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Aug 2014 |
|
JP |
|
Primary Examiner: May; Robert
Assistant Examiner: Macchiarolo; Leah S
Attorney, Agent or Firm: Kirton McConkie Witt; Evan R.
Claims
What is claimed is:
1. An illumination system for a projection device, the illumination
system comprising: a first light source module comprising plural
first light sources for emitting plural first light beams,
respectively; a first reflective mirror module comprising: at least
one first reflective mirror located at a first optical axis of the
plural first light sources; at least one first fixing structure for
fixing the first reflective mirror and comprises a first fixing
hole; and at least one first adjusting mechanism connected with the
first fixing structure; a second light source module opposed to the
first light source module, and comprising plural second light
sources for emitting plural second light beams, respectively; and a
second reflective mirror module comprising: at least one second
reflective mirror located at a second optical axis of the plural
second light sources; at least one second fixing structure for
fixing the second reflective mirror and comprises a second fixing
hole; at least one second adjusting mechanism connected with the
fixing structure; and an auxiliary fixing element is penetrated
through the first fixing hole of the first fixing structure and the
second fixing hole of the second fixing structure for positioning
the first fixing structure and the second fixing structure; wherein
by extracting the auxiliary fixing element from the first fixing
hole and the second fixing hole, and moving or rotating the first
adjusting mechanism and the second adjusting mechanism, a location
and an angle of the first reflective mirror relative to the first
optical axis are correspondingly changed, and a location and an
angle of the second reflective mirror relative to the second
optical axis are also correspondingly changed, so that the first
light beam and the second light beam are reflected by the first
reflective mirror and the second reflective mirror respectively,
and guided along a specified optical path.
2. The illumination system according to claim 1, further comprising
a focusing element, wherein after the first light beam is reflected
by the first reflective mirror and the second light beam is
reflected by the second reflective mirror, the first light beam and
the second light beam are guided to the focusing element.
3. The illumination system according to claim 1, wherein each of
the plural first light sources and the plural second light sources
are arranged in a planar array of M rows and N columns.
4. The illumination system according to claim 3, wherein the at
least one first reflective mirror comprises M first reflective
mirrors, and the M first reflective mirrors are in parallel with
each other, wherein the at least one second reflective mirror
comprises M second reflective mirrors, and the M second reflective
mirrors are in parallel with each other.
5. The illumination system according to claim 4, wherein the first
reflective mirror comprises alternate transmissible zones and
reflective zones, and the reflective zones of the first reflective
mirror are aligned with the first optical axis, wherein the second
reflective mirror comprises alternate transmissible zones and
reflective zones, and the reflective zones of the second reflective
mirror are aligned with the second optical axis.
6. The illumination system according to claim 3, wherein the at
least one first fixing structure comprises N first fixing
structures, and the at least one second fixing structure comprises
N second fixing structures, wherein the N first fixing structures
and the N second fixing structures are staggered.
7. The illumination system according to claim 1, wherein the first
reflective mirror is fixed and clamped by the first fixing
structure, wherein the second reflective mirror is fixed and
clamped by the second fixing structure.
8. The illumination system according to claim 1, further comprising
a covering member, wherein the covering member comprises a carrier,
a frame and a lateral plate, wherein the frame comprises an
accommodation space for accommodating the carrier, the first
reflective mirror module and the second reflective mirror module
are supported by the carrier, and the lateral plate is disposed on
the frame, wherein the lateral plate comprises plural perforations,
and the first adjusting mechanism and the second adjusting
mechanism are penetrated through the corresponding perforations and
partially exposed to an outer surface of the lateral plate.
9. The illumination system according to claim 1, wherein the first
fixing structure is synchronously moved or rotated with the first
adjusting mechanism, wherein the first adjusting mechanism
comprises a first adjusting lever, the first fixing structure
comprises a first pivotal hole, and the first adjusting lever is
penetrated through the first pivotal hole to be moved or rotated,
wherein the second fixing structure is synchronously moved or
rotated with the second adjusting mechanism, wherein the second
adjusting mechanism comprises a second adjusting lever, the second
fixing structure comprises a second pivotal hole, and the second
adjusting lever is penetrated through the second pivotal hole to be
moved or rotated.
10. The illumination system according to claim 1, further
comprising a covering member, wherein the covering member comprises
a lateral plate with plural perforations, wherein the first
adjusting mechanism, the second adjusting mechanism and the
auxiliary fixing element are penetrated through the corresponding
perforations of the lateral plate and exposed to an outer surface
of the lateral plate.
Description
FIELD OF THE INVENTION
The present invention relates to an illumination system, and more
particularly to an illumination system having an adjusting
mechanism for adjusting a reflective mirror module.
BACKGROUND OF THE INVENTION
In recent years, a variety of projectors have been widely used in
various video applications. For example, projectors can be used for
making presentations, holding meetings or giving lectures in
classrooms, boardrooms, conference rooms or home theaters. By the
projector, an image signal from an image signal source can be
enlarged and shown on a projection screen. For reducing power loss
and overall volume and increasing the image quality, the
illumination system of the current projector employs a solid-state
light-emitting element (e.g. light emitting diode or laser diode)
to replace the conventional high intensity discharge (HID) lamp or
ultra-high pressure (UHP) mercury lamp.
Generally, for increasing the total light amount, plural
solid-state light-emitting elements of the conventional
illumination system are arranged in an array. Moreover, plural
reflective mirrors are aligned with the optical axis of the array
of the solid-state light-emitting elements. The light beams from
the array of the solid-state light-emitting elements are reflected
by the reflective mirrors and guided to the same focusing lens.
After the light beams are focused by the focusing lens, the focused
light beams are guided to an imaging system.
However, due to the assembly tolerance of the light-emitting
elements and the reflective mirrors or the characteristics of the
light-emitting elements (e.g. the beam angle), the light beams
reflected by the reflective mirrors cannot be effectively
centralized and guided to the same focusing lens. Moreover, since
no proper adjusting mechanism can be used to adjust the reflective
mirrors, the above drawbacks fail to be overcome. Under this
circumstance, the power loss is increased, and the utilization
efficiency of the illumination system is deteriorated. Moreover,
since the intensity of the light beams introduced into the
projection device is insufficient, the image quality and the
luminance are adversely affected. Since the reflected light beams
are not propagated along the specified optical path, the
temperature of the illumination system is increased.
Therefore, there is a need of providing an improved illumination
system in order to overcome the above drawbacks.
SUMMARY OF THE INVENTION
An object of the present invention provides an illumination system.
The illumination system comprises a light source, a reflective
mirror, a fixing structure, and an adjusting mechanism. By the
adjusting mechanism, the location and the angle of the reflective
mirror relative to the optical axis of the light source is
adjusted. Consequently, the light beam reflected by the reflective
mirror can be effectively guided to the focusing element.
Consequently, the performance of the illumination system is
enhanced, and the power loss and overheated problem from the
assembling error are minimized.
Another object of the present invention provides an illumination
system for increasing the imaging quality and luminance of a
projection device.
In accordance with an aspect of the present invention, there is
provided an illumination system for a projection device. The
illumination system includes a first light source module and a
first reflective mirror module. The first light source module
includes plural first light sources for emitting plural first light
beams, respectively. The first reflective mirror module includes at
least one first reflective mirror, at least one first fixing
structure, and at least one first adjusting mechanism. The first
reflective mirror is located at a first optical axis of the plural
first light sources. The at least one first fixing structure is
used for fixing the first reflective mirror. The first adjusting
mechanism is connected with the first fixing structure. By moving
or rotating the first adjusting mechanism, a location and an angle
of the first reflective mirror relative to the first optical axis
are correspondingly changed, so that the first light beam is
reflected by the first reflective mirror and guided along a
specified optical path.
In accordance with another aspect of the present invention, there
is provided an illumination system for a projection device. The
illumination system includes a light source, a reflective mirror, a
fixing structure, and an adjusting mechanism. The light source
emits a light beam. The reflective mirror is located at an optical
axis of the light source. The fixing structure is used for fixing
the reflective mirror. The adjusting mechanism is connected with
the fixing structure. By moving or rotating the adjusting
mechanism, a location and an angle of the reflective mirror
relative to the optical axis are correspondingly changed, so that
the light beam is reflected by the reflective mirror and guided
along a specified optical path.
The above contents of the present invention will become more
readily apparent to those ordinarily skilled in the art after
reviewing the following detailed description and accompanying
drawings, in which:
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1A is a schematic exploded view illustrating an illumination
system according to a first embodiment of the present
invention;
FIG. 1B is a schematic assembled view of the illumination system of
FIG. 1A;
FIG. 2 schematically illustrates a first reflective mirror module
of the illumination system according to the first embodiment of the
present invention;
FIGS. 3A and 3B schematically illustrate the optical paths of the
light beams of the illumination system according to the first
embodiment of the present invention;
FIG. 4A is a schematic exploded view illustrating an illumination
system according to a second embodiment of the present
invention;
FIG. 4B is a schematic assembled view of the illumination system of
FIG. 4A;
FIG. 5 schematically illustrates the optical paths of the light
beams of the illumination system according to the second embodiment
of the present invention; and
FIG. 6 schematically illustrates an approach of adjusting the first
reflective mirror by the first adjusting mechanism according to the
second embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The present invention will now be described more specifically with
reference to the following embodiments. It is to be noted that the
following descriptions of preferred embodiments of this invention
are presented herein for purpose of illustration and description
only. It is not intended to be exhaustive or to be limited to the
precise form disclosed.
Please refer to FIG. 1A, FIG. 1B, FIG. 2, FIG. 3A and FIG. 3B. FIG.
1A is a schematic exploded view illustrating an illumination system
according to a first embodiment of the present invention. FIG. 1B
is a schematic assembled view of the illumination system of FIG.
1A. FIG. 2 schematically illustrates a first reflective mirror
module of the illumination system according to the first embodiment
of the present invention. FIGS. 3A and 3B schematically illustrate
the optical paths of the light beams of the illumination system
according to the first embodiment of the present invention.
The illumination system 1 of the present invention is applied to a
projection device. An example of the projection device includes but
is not limited to a digital light processing (DLP) projector or a
liquid crystal display (LCD) projector. In this embodiment, the
illumination system 1 comprises a first light source module 11, a
first reflective mirror module 12, and a covering member 16. The
first light source module 11 is exposed outside the covering member
16, and located at a first side of the covering member 16. The
first reflective mirror module 12 is at least partially disposed
within the covering member 16. The first light source module 11
comprises one or more first light sources 111. Each first light
source 111 emits a first light beam 1111. The first reflective
mirror module 12 comprises at least one first reflective mirror
121, at least one first fixing structure 122, and at least one
first adjusting mechanism 123. The first reflective mirror 121 is
disposed within the covering member 16 and aligned with an optical
axis (not shown) of the first light source 111. The first fixing
structure 122 is used for fixing the first reflective mirror 121.
The first adjusting mechanism 123 is partially protruded outside
the covering member 16 and connected with the first fixing
structure 122. The first fixing structure 122 is synchronously
moved or rotated with the first adjusting mechanism 123. That is,
by moving or rotating the first adjusting mechanism 123, the
location and the angle of the first reflective mirror 121 relative
to the optical axis of the first light source 111 are
correspondingly changed. Consequently, the first light beam 1111 is
reflected by the first reflective mirror 121 and guided to a
focusing element 15 along a specified optical path.
In this embodiment, the first light source module 11 comprises
plural first light sources 111. Each of the plural first light
sources 111 emits the first light beam 1111. An example of the
first light source 111 includes but is not limited to a light
emitting diode or laser diode. Moreover, the plural first light
sources 111 are arranged in a planar array. As shown in FIG. 1A,
twenty-four first light sources 111 of the first light source
module 11 are arranged in a planar array of four columns and six
rows. It is noted that the number and arrangement of the first
light sources 111 may be varied according to the practical
requirements. Moreover, the first light source module 11 further
comprises one or more first bases 112 for fixing and accommodating
the plural first light sources 111. In this embodiment, the first
light source module 11 comprises three first bases 112. The three
first bases 112 are stacked on each other, and located at a side of
the covering member 16. In particular, eight first light sources
111 are arranged in an array of four columns and two rows, and
fixed and accommodated by each first base 112. Consequently, the
first light beams 1111 from the first light source module 11 are
directed to the first reflective mirror module 12 in the same
incidence manner.
In this embodiment, the first reflective mirror module 12 comprises
plural first reflective mirrors 121, plural first fixing structures
122, and plural adjusting mechanisms 123. Each first reflective
mirror 121 is located at the optical paths of the corresponding
first light sources 111 for reflecting the corresponding first
light beams 1111. Consequently, the plural first light beams 1111
are guided to a focusing element 15. In this embodiment, the number
of the first reflective mirrors 121 of the first reflective mirror
module 12 is equal to the number of the rows of the first light
sources 111 of the first light source module 11. For example, as
shown in FIG. 1A, the first reflective mirror module 12 comprises
six first reflective mirrors 121. The six first reflective mirrors
121 are located at the optical axes of the six rows of first light
sources 111, respectively. In this embodiment, the first reflective
mirrors 121 are rectangular, and these first reflective mirrors 121
are in parallel with each other. Consequently, the plural first
light beams 1111 reflected by the first reflective mirrors 121 will
not interfere with each other. It is noted that the number,
arrangement and shape of the first reflective mirrors 121 may be
varied according to the practical requirements.
Please refer to FIG. 1A, FIG. 1B, FIG. 2, FIG. 3A and FIG. 3B
again. Moreover, each first reflective mirror 121 comprises at
least one transmissible zone 1211 and at least one reflective zone
1212. In this embodiment, each first reflective mirror 121
comprises four transmissible zones 1211 and four reflective zones
1212, which are alternately arranged. The transmissible zones 1211
are light-transmissible. The reflective zones 1212 may reflect
light beams. For example, the reflective zones 1212 are produced by
a metal sputtering process. In this embodiment, the four reflective
zones 1212 are aligned with the optical axel of the corresponding
first light sources 111 of the first light source module 11.
Consequently, the first light beams 1111 from the first light
sources 111 are reflected by the reflective zones 1212 of the
corresponding first reflective mirrors 121 and guided to the
focusing element 15.
In this embodiment, the covering member 16 comprises a carrier 17,
a frame 18, and a lateral plate 19. The frame 18 comprises an
accommodation space 181 for accommodating the carrier 17. The
carrier 17 is used for supporting the first reflective mirror
module 12. The first reflective mirrors 121 of the first reflective
mirror module 12 are disposed within the carrier 17. The first
fixing structures 122 and the first adjusting mechanisms 123 are
located outside the carrier 17. The first light source module 11 is
fixedly located at a side of the carrier 17. The lateral plate 19
is disposed on the frame 18. Moreover, the lateral plate 19
comprises plural perforations 191. The first adjusting mechanisms
123 are penetrated through the perforations 191, so that the first
adjusting mechanisms 123 are partially exposed to the outer surface
of the lateral plate 19 to be adjusted by the user.
The first fixing structures 122 are used for fixing and supporting
the first reflective mirrors 121 by a clamping means, an adhering
means, a screwing means or an engaging means. As shown in FIG. 2,
the two ends of each first reflective mirror 121 are clamped by two
first fixing structures 122.
The first adjusting mechanism 123 is connected with the first
fixing structure 122. The first adjusting mechanism 123 is
penetrated through the corresponding perforation 191 of the lateral
plate 19 of the covering member 16, so that the first adjusting
mechanism 123 is partially exposed to the outer surface of the
covering member 16. The first adjusting mechanism 123 is
interference-fitted in the corresponding perforation 191 of the
lateral plate 19. As known, if the first light source module 11 or
the first reflective mirror module 12 has a design error or an
assembling error, some problems may occur. For example, if the
first reflective mirror 121 is shifted or the reflective zone 1212
is deviated from the optical axis of the first light source 111,
the optical path of guiding the reflected first light beam 1111 to
the focusing element 15 is deviated. Under this circumstance, the
first light beam 1111 cannot be effectively focused by the focusing
element 15. For solving the problems, the user may rotate or move
the first adjusting mechanism 123 to adjust the location and the
angle of the first reflective mirror 121 relative to the optical
axis of the first light source 111.
It is noted that the way of adjusting the first reflective mirror
121 by the first adjusting mechanism 123 is not restricted. In
another embodiment, the first adjusting mechanism 123 comprises a
packing screw (not shown), a screw hole (not shown), and a spring
(not shown). The screw hole is formed in the first fixing structure
122. The spring is disposed within the screw hole and sheathed
around the packing screw. If the first light source module 11 or
the first reflective mirror module 12 has a design error or an
assembling error, the user may change the relative position between
the packing screw and the screw hole or rotate the packing screw in
order to adjust the location and the angle of the first reflective
mirror 121 relative to the optical axis of the first light source
111. When the relative position between the packing screw and the
screw hole is changed, the spring is correspondingly compressed or
loosened. After the location and the angle of the first reflective
mirror 121 relative to the optical axis of the first light source
111 are adjusted by moving or rotating the first adjusting
mechanism 123, the reflective zones 1212 of the first reflective
mirror 121 can be aligned with the corresponding first light
sources 111 of the first light source module 11 and the first light
beam 111 can be effectively guided along the optical path to the
focusing element 15.
Please refer to FIG. 1A, FIG. 1B, FIG. 2, FIG. 3A and FIG. 3B
again. In this embodiment, the illumination system 1 further
comprises a second light source module 13 and a second reflective
mirror module 14. The second light source module 13 is exposed
outside the covering member 16, and located at a second side of the
covering member 16. The second reflective mirror module 14 is at
least partially disposed within the covering member 16. The first
light source module 11 and the second light source module 13 are
located at opposite sides of the covering member 16. The second
light source module 13 comprises one or more second light sources
131 and one or more second bases 132. Each second light source 131
emits a second light beam 1311. The second reflective mirror module
14 comprises at least one second reflective mirror 141, at least
one second fixing structure 142, and at least one second adjusting
mechanism 143. The second fixing structure 142 is used for fixing
the second reflective mirror 141. The second reflective mirror 141
is aligned with an optical axis (not shown) of the corresponding
second light source 131 for reflecting the corresponding second
light beam 1311. Moreover, each second reflective mirror 141
comprises at least one transmissible zone 1411 and at least one
reflective zone 1412. In this embodiment, each second reflective
mirror 141 comprises four transmissible zones 1411 and four
reflective zones 1412, which are alternately arranged. In this
embodiment, the four reflective zones 1212 are aligned with the
optical axel of the corresponding second light sources 131 of the
second light source module 13. The structures and functions of the
second light source module 13 and the second reflective mirror
module 14 are similar to those of the first light source module 11
and the first reflective mirror module 12, and are not redundantly
described herein.
Please refer to FIGS. 3A and 3B again. The three first reflective
mirrors 121a, 121b and 121c are farther from the focusing element
15 than the three first reflective mirrors 121d, 121e and 121f. The
three second reflective mirrors 141a, 141b and 141c are farther
from the focusing element 15 than the three second reflective
mirrors 141d, 141e and 141f. The reflective zones 1212 of the three
first reflective mirrors 121a, 121b and 121c are aligned with the
corresponding first light sources 111. Consequently, the first
light beams 1111 from the corresponding first light sources 111 are
reflected by the reflective zones 1212 of the three first
reflective mirrors 121a, 121b and 121c and guided to the focusing
element 15. Similarly, the reflective zones 1412 of the three
second reflective mirrors 141a, 141b and 141c are aligned with the
corresponding second light sources 131. Consequently, the second
light beams 1311 from the corresponding second light sources 131
are reflected by the reflective zones 1412 of the three second
reflective mirrors 141a, 141b and 141c and guided to the focusing
element 15.
On the other hand, the reflective zones 1212 of the three first
reflective mirrors 121d, 121e and 121f and aligned with
corresponding transmissible zones 1411 of the three second
reflective mirrors 141d, 141e and 141f and the corresponding first
light sources 111. Consequently, the first light beams 1111 from
the corresponding first light sources 111 are transmitted through
the transmissible zones 1411 of the three second reflective mirrors
141d, 141e and 141f, reflected by the reflective zones 1212 of the
three first reflective mirrors 121d, 121e and 121f and guided to
the focusing element 15. Similarly, the reflective zones 1212 of
the three second reflective mirrors 141d, 141e and 141f and aligned
with corresponding transmissible zones 1211 of the three first
reflective mirrors 121d, 121e and 121f and the corresponding second
light sources 131. Consequently, the second light beams 1311 from
the corresponding second light sources 131 are transmitted through
the transmissible zones 1211 of the three second reflective mirrors
121d, 121e and 121f, reflected by the reflective zones 1412 of the
three second reflective mirrors 141d, 141e and 141f and guided to
the focusing element 15. Since the structures and arrangements of
the first light source module 11, the first reflective mirror
module 12, the second light source module 13 and the second
reflective mirror module 14 are specially designed, the optical
paths of the light beams will not interfere with each other.
Consequently, space utilization is enhanced, and the volume of the
illumination system is reduced.
Please refer to FIG. 4A, FIG. 4B, FIG. 5 and FIG. 6. FIG. 4A is a
schematic exploded view illustrating an illumination system
according to a second embodiment of the present invention. FIG. 4B
is a schematic assembled view of the illumination system of FIG.
4A. FIG. 5 schematically illustrates the optical paths of the light
beams of the illumination system according to the second embodiment
of the present invention. FIG. 6 schematically illustrates an
approach of adjusting the first reflective mirror by the first
adjusting mechanism according to the second embodiment of the
present invention.
In this embodiment, the illumination system 2 comprises a first
light source module 21, a first reflective mirror module 22, and a
covering member 27. The first light source module 21 is exposed
outside the covering member 27, and located at a first side of the
covering member 27. The first reflective mirror module 22 is
disposed with an accommodation space 271 of the covering member 27.
The first light source module 21 comprises one or more first light
sources 211. Each first light source 211 emits a first light beam
2111. The number and arrangement of the first light sources 211 of
the first light source module 21 are similar to those of the first
embodiment, and are not redundantly described herein.
The first reflective mirror module 22 comprises at least one first
reflective mirror 221, at least one first fixing structure 222, and
at least one first adjusting mechanism 223. The first reflective
mirror 221 is aligned with an optical axis (not shown) of the
corresponding first light source 211 for reflecting the
corresponding first light beam 2111. Consequently, the first light
beam 2111 is reflected by the first reflective mirror 221 and
guided to a focusing element 25. The first fixing structure 222 is
used for fixing the first reflective mirror 221 by a clamping
means, an adhering means, a screwing means or an engaging means. In
this embodiment, the number of the first fixing structures 222 is
equal to the column number of the first light sources 211 of the
first light source module 21. For example, as shown in FIG. 4A, the
first reflective mirror module 22 comprises four first fixing
structures 222. The four first fixing structures 222 are in
parallel with four columns of first light sources 211. Moreover,
plural first reflective mirrors 221 are discretely disposed on each
first fixing structure 222 in a stepped arrangement. Consequently,
the plural first light beams 2111 reflected by the first reflective
mirrors 221 will not interfere with each other. For example,
twenty-four first light sources 211 of the first light source
module 21 are arranged in a planar array of four columns and six
rows. That is, six first light sources 211 in each column are
separated from each other at the same spacing interval, and six
first reflective mirrors 221 are discretely disposed on each first
fixing structure 222 in a stepped arrangement. In particular, the
optical axes of the six first light sources 211 in the same column
are aligned with the six first reflective mirrors 221,
respectively. Consequently, the first light beams 2111 are
reflected by the corresponding first reflective mirror 221 and
guided to the focusing element 25.
The first adjusting mechanism 223 is connected with the first
fixing structure 222. In some embodiments, the first adjusting
mechanism 223 is penetrated through the first fixing structure 222
and connected with the first fixing structure 222. By moving or
rotating the first adjusting mechanism 223, the location and the
angle of the first reflective mirror 221 relative to the optical
axis of the first light source 211 are correspondingly changed.
Consequently, the first light beam 2111 is reflected by the first
reflective mirror 221 and guided to the focusing element 25 along a
specified optical path. In this embodiment, the first adjusting
mechanism 223 is an adjusting lever, but is not limited thereto.
The first fixing structure 222 has a pivotal hole corresponding to
the adjusting lever 223. The diameter of the pivotal hole is
slightly larger than the diameter of the adjusting lever 223. For
assembling the first reflective mirror module 22, the first
reflective mirrors 221 are aligned with the optical axes of the
corresponding first light sources 211, and the first adjusting
mechanisms 223 are penetrated through corresponding pivotal holes
of the corresponding first fixing structure 222.
As known, if the first light source module 21 or the first
reflective mirror module 22 has a design error or an assembling
error, some problems may occur. For example, if the first
reflective mirror 221 is shifted or the reflective zone 2212 is
deviated from the optical axis of the first light source 211, the
optical path of guiding the reflected first light beam 2111 to the
focusing element 25 is deviated. Under this circumstance, the first
light beam 2111 cannot be effectively focused by the focusing
element 25. For solving these problems, the user may rotate or move
the first adjusting mechanism 223 to adjust the location and the
angle of the first reflective mirror 221 relative to the optical
axis of the first light source 211.
Please refer to FIG. 5. By rotating the first adjusting mechanism
223, the angle of the first reflective mirror 221 relative to the
optical axis of the first light source 211 is adjusted.
Consequently, the first light beam 2111 reflected by the first
reflective mirror 221 can be effectively guided to the focusing
element 25. Please refer to FIG. 6. By moving the first adjusting
mechanism 223 in the direction A or the direction B, the location
of the first reflective mirror 221 relative to the optical axis of
the first light source 211 is adjusted. In other words, the
location and the angle of the first reflective mirror 221 relative
to the optical axis of the first light source 211 may be adjusted
through the first adjusting mechanism 223 according to the
practical requirements. After adjustment, the first light beam 2111
reflected by the first reflective mirror 221 can be effectively
guided to the focusing element 25. Under this circumstance, the
performance of the illumination system 2 is enhanced, and the power
loss and overheated problem from the assembling error are
minimized.
Please refer to FIG. 4A, FIG. 4B, FIG. 5 and FIG. 6 again. In this
embodiment, the illumination system 2 further comprises a second
light source module 23 and a second reflective mirror module 24.
The second light source module 23 is exposed outside the covering
member 27, and located at a second side of the covering member 27.
The first light source module 21 and the second light source module
23 are located at opposite sides of the covering member 27. The
second light source module 23 comprises one or more second light
sources 231. Each second light source 231 emits a second light beam
(not shown). For avoiding interference between the second light
beams and the first light beams, the second light sources 231 and
the first light sources 211 in the same row are staggered. The
number and arrangement of the second light sources 231 of the
second light source module 23 are similar to those of the first
light sources 211 of the first light source module 21, and are not
redundantly described herein.
The second reflective mirror module 24 comprises at least one
second reflective mirror 241, at least one second fixing structure
242, and at least one second adjusting mechanism 243. The second
fixing structure 242 is used for fixing the second reflective
mirror 241. The second reflective mirror 241 is aligned with an
optical axis (not shown) of the corresponding second light source
231 for reflecting the corresponding second light beam. The second
adjusting mechanism 243 is connected with the second fixing
structure 242. In some embodiments, the second adjusting mechanism
243 is penetrated through the pivotal hole of the second fixing
structure 242 and connected with the second fixing structure 242.
The second fixing structure 242 is synchronously moved or rotated
with the second adjusting mechanism 243. By moving or rotating the
second adjusting mechanism 243, the location and the angle of the
second reflective mirror 241 relative to the optical axis of the
second light source 231 are correspondingly changed. Consequently,
the second light beam is reflected by the second reflective mirror
241 and guided to the focusing element 25 along a specified optical
path. The structures and functions of the second light source
module 23 and the second reflective mirror module 24 are similar to
those of the first light source module 21 and the first reflective
mirror module 22, and are not redundantly described herein.
In this embodiment, the illumination system 2 comprises plural
first fixing structures 222 and plural second fixing structures
242. The number of the first fixing structures 222 is equal to the
column number of the first light sources 211 of the first light
source module 21, and the number of the second fixing structures
242 is equal to the column number of the second light sources 213
of the second light source module 23. As shown in FIG. 4A, the four
first fixing structures 222 are aligned with the corresponding
columns of the first light sources 211, and the four second fixing
structures 242 are aligned with the corresponding columns of the
second light sources 213. Consequently, the first light beams 2111
are reflected by the corresponding first reflective mirrors 221 and
guided to the focusing element 25, and the second light beams are
reflected by the corresponding second reflective mirrors 241 and
guided to the focusing element 25. Moreover, the first fixing
structures 222 and the second fixing structures 242 are staggered.
Since the first fixing structures 222 and the second fixing
structures 242 are staggered, the first light beams 2111 and the
second light beams will not interfere with each other.
In some embodiments, the covering member 27 further comprises a
lateral plate 272. The lateral plate 272 has plural perforations
273. The illumination system 2 further comprises an auxiliary
fixing element 26. An example of the auxiliary fixing element 26
includes but is not limited to a fixing rod. The auxiliary fixing
element 26 is used for positioning the plural first fixing
structures 222 and the plural second fixing structures 242. As
shown in FIGS. 4A and 4B, the first adjusting mechanism 223, the
second adjusting mechanism 243 and the auxiliary fixing element 26
are penetrated through the corresponding perforations 273 of the
lateral plate 272 and exposed to the outer surface of the lateral
plate 272. Moreover, each of the plural first fixing structures 222
and the plural second fixing structures 242 comprises a fixing
hole. The fixing holes of the plural first fixing structures 222
and the fixing holes of the plural second fixing structures 242 are
aligned with each other. After the auxiliary fixing element 26 is
penetrated through the fixing holes of the plural first fixing
structures 222 and the fixing holes of the plural second fixing
structures 242, the plural first fixing structures 222 and the
plural second fixing structures 242 are positioned by the auxiliary
fixing element 26. Alternatively, the auxiliary fixing element 26
can be extracted from the fixing holes of the plural first fixing
structures 222 and the fixing holes of the plural second fixing
structures 242, so that the locations and angles of the plural
first fixing structures 222 and the plural second fixing structures
242 can be adjusted.
From the above descriptions, the present invention provides an
illumination system. The illumination system comprises a light
source, a reflective mirror, a fixing structure, and an adjusting
mechanism. By the adjusting mechanism, the location and the angle
of the reflective mirror relative to the optical axis of the light
source is adjusted. Consequently, the light beam reflected by the
reflective mirror can be effectively guided to the focusing
element. Consequently, the performance of the illumination system 2
is enhanced, and the power loss and overheated problem from the
assembling error are minimized.
While the invention has been described in terms of what is
presently considered to be the most practical and preferred
embodiments, it is to be understood that the invention needs not be
limited to the disclosed embodiment. On the contrary, it is
intended to cover various modifications and similar arrangements
included within the spirit and scope of the appended claims which
are to be accorded with the broadest interpretation so as to
encompass all such modifications and similar structures.
* * * * *